Philip medart



(N Model.)

-P. ME D AR T.

Belt Pulley.

No. 238,702. PatentedMarch 8,1881.

r 2% i a INVENTORf NTTED STATES PATENT OFFICE.

PHILIP MEDART, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO WILLIAMMEDART, OF SAME PLACE.

BELT-PULLEY.

SPECIFICATION forming part of Letters Patent No. 238,702, dated March 8,1881.

Application filed November 27, 1880.

To all whom it may concern Be it known that I, PHILIP MEDART, a citizenof the United States, residing at St. Louis, State of Missouri, haveinvented certain new and useful Improvements in Belt-Pulleys; and I dohereby declare that the following is a full, clear, and exactdescription of the invention, reference being had to theaccompanyingdrawings, and to the letters of reference marked thereon,forming a part of this specification, and in which Figure 1 is aperspective view, and Fig. 2 is a vertical section.

This invention relates to certain improvements in belt-pulleys, and hasfor its object, first, the production of a cheap, light, and durablepulley; and, secondly, the production of irregular sizes of pulleyswithout the necessity of a separate pattern for each size of pulleyrequired; and this invention consists, first, in constructing the usualcrown or dish on the rim of wrough t-nietal rimmed pulleys by bendingsaid rim transversely during the process of manufacture; secondly, thebelt-pulley havin g arms formed of wood, preferably of a cylindricalshape, which at their inner ends rest in sockets cast on the hub, and attheir outer ends are provided with bracket-lugs, to which the pin issecured by rivets or other equivalent means.

To enable others skilled in the art to which my invention appertains tomake and use the same, I will now proceed to more fully describe thesame.

A is the hub of the pulley, cast with radial sockets to to receive theinner ends of the wooden arms B of the pulley. The recesses in thesesockets are preferably of a cone shape, and the ends of the arms arecorrespondingly shaped so as to fit the same and have a firm and strongbearing.

(J are bracket-lugs attached to the outer (No model.)

ends of the arms B, and provided with rivetholes for the passage ofrivets, by means of which the rim D of the pulley is secured in place.The part of the arms B that enters the bracket-lugs is preferablyreduced in size, so as to form a shoulder, b, on which the lug rests, asclearly indicated in Fig. 2.

The rim D may be of any suitable materialeither wrought-iron, steel, orwood-with the bracket-1n gs 0 arranged transversely,as shown in order tobrace and support the edges of the rim and prevent the same from Workingloose from its attachment, which is liable to occur when thebracket-lugs are not arranged as above set forth.

The crown or dish d usual to belt-pulleys is formed on the rim D bybending or dishing the rim during the process of manufacture, preferablyat the same time and by means of the same rolls that bend the rim intothe required circular shape.

By the use of wood for forming the arms of the pulley, as above setforth, a much lighter and cheaper pulley can be produced than where ironis used for said arms, and yet possess as great strength.

Having thus fully described my said invention,what I claim as new,anddesire to secure by Letters Patent, is-

l. A wrought-metal rimmed pulley having a crown, d, formed on its rimduring the process of manufacture, as described, and for the purpose setforth.

2. A belt-pulley provided with wooden arms B, a cast-metal hub, A,having radial sockets to and bracket-1n gs O, for the attachment of therim D, as described, and for the purpose set forth.

PHILIP M EDART. In presence of-- WM. MEDART, ROBERT Bonus.

